Improvement in double-acting lift and force pumps



W. LOUDON. Double-Acting Lift and Force Pump;

Patented Jan 7, 18791 WITNESSES: 1

dM Mw/o ATTORNEYS.

N-PETBIS, PIIDTO-UIHOGRAPHEIL WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

WILLIAM LOUDON, OF SUPERIOR, NEBRASKA.

IMPROVEMENT IN DOUBLE-ACTING LIFT AND FORCE PUMPS.

Specification forming part of Letters Patent N o. 211,] 68, datedJanuary 7, 1879; application filed November 7, 1878.

To all whom it may concern.-

Be it known that I, WILLIAM LOUDON, of Superior, in the county of Nuckolls and State of Nebraska, have invented a new and usefulImprovement in Double-Actin g Lift and Force ffumps, of which thefollowing is a specificaion:

Figure 1 is a longitudinal section of one of my improved pumps. Fig. 2is a detail view of the ringvalve plate. Fig. 3 is a detail bottom viewof the hollow piston. Fig. 4 is a detail section of the hollow pistonand lower part of the hollow piston-rod, showing another form of valve.Fig. 5 is the same view as Fig. 4, but showing another form of valve.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish improved lift and forcepumps, which shall be so constructed as to throw a continuous stream ofwater, and which at the same time shall be simple in construction andeffective and reliable in use.

The invention will first be described in connection with the drawing,and then pointed out in the claim.

A represents a pump-case, which is provided with a discharge-nozzle, B,and a leverhandle, 0, or other suitable operating device, and about theconstruction of which parts there is nothing new. 4 d

To the lever O, or other operating device, is hinged the upper end of arod, D, the lower end of which is screwed into, or otherwise attachedto, the upper end of the hollow pistonrod E. In the upper part of thehollow piston-rod E are formed openings to allow the water to escapefreely into the tube F.

In the upper end of the cylinder G are formed one or more openings, 9closed by valves H, opening inward, and in its lower end are formed oneor more openings, 9 closed by valves I, opening inward.

The hollow piston-rod E passes down through a stuffing-box, J, at theupper end of the cylinder G, and to its lower end, 'within the cylinderG, is attached a hollow piston, K, which fits into the said cylinder G,and has a ringgroove formed in its outer surface to receive interiorwhen desired.

packing, so that it may move water-tight within the said cylinder G.

The piston K is designed to be made in two or more parts, screwed orbolted together, so that access can be conveniently had to its In thetop of the piston K are formed openings k, and in its bottom are formedopenings k through which alternately water passes into the interior ofthe said piston. Within the piston K is placed a ring-plate, L, the holein its center corresponding with the bore of the hollow pistonrod K, sothat the open lower end of the said hollow piston-rod will always beuncovered. The ring-plate L thus acts as a valve to close the openings70 k alternately.

If desired, each of the openings it It may be provided with its ownvalve, which may be hinged valves, opening inward, as shown in Fig. 4,or drop-valves, sliding upon small rods passing through and secured inthe said openings It k so that they will close the said openingsalternately, as shown in Fig. 5, the form of the valves being whollyimmaterial.

With this construction. as the piston Kmoves upward, the pressure of thewater in the upper part of the cylinder Gwill close the valve or valvesin the top of the cylinder, open the valve or valves in the top of thepiston K, and close the valve or valves in its bottom, and thewater willpass into the hollow piston K and out through the hollow piston-rod E.At the same time the upward movement of the piston K will form a vacuumin the lower part of the cylinder G, and the pressure of the outsidewater will open the valve or valves I in the bottom of the said cylinderG and fill its said lower part. downward the pressure of the Water inthe lower part of the cylinder G will close the valve or valves Iin itsbottom, open the valve or valves in the bottom of the hollow piston K,close the valve or valves in its top, and pass out through the saidhollow piston K and the hollow piston-rod E. At the same time thedownward movement of the piston K will form a vacuum in the upper partof the cylinder G, and the pressure of the outside water will open thevalve or valves H in the top of the As the piston K movessaid cylinderGand fill its upper part. With upper and lower end, the hollow rod E,havthis construction the pump will throw 2t cons ing side holes at theupper end, the tube F, tinuous stream of water. and the case A, havingspout B, all rela- Having thus described my invention, I tively arrangedas and for the purpose speoiclaim as new and desire to secure by Lettersfied.

' Patent- WILLIAM LOUD ON.

The combination of the hollow piston K, hEtV- Witnesses: in g valvedopenings at top and bottom, the cyl- M. L. FoGEL, inder G, provided withvalved openings at Y J OsEPH LoUDoN.

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